Table 2. Percentages of CD14⁺, CD86⁺CD14⁺ and CD206⁺CD14⁺ macrophages in pleural effusions and peripheral blood.

Variable	MPE (n=34)	BPE (n=26)	P value
Pleural effusion
CD14+ cells, %	20.2±2.9	6.8±1.4	<0.001
CD86+CD14+ cells, %	16.7±1.5	11.3±1.1	0.008
CD206+CD14+ cells, %	62.1±2.9	19.5±2.1	<0.001
Blood
CD14+ cells, %	15.4±1.3	14.7±1.4	0.704
CD86+CD14+ cells, %	1.6±0.2	1.1±0.1	0.091
CD206+CD14+ cells, %	0.2±0.1	0.3±0.1	0.311

Data are presented as mean ± SEM. Comparisons of data between MPE and BPE were analyzed by using Student’s t-test. Comparisons of data in pleural effusion and in the corresponding blood were analyzed by using paired t-test. MPE, malignant pleural effusion; BPE, benign pleural effusion.